CN103060578A - Method for smelting lead-bismuth concentrate in oxygen-rich side-blown duplex furnace - Google Patents
Method for smelting lead-bismuth concentrate in oxygen-rich side-blown duplex furnace Download PDFInfo
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- CN103060578A CN103060578A CN2013100355343A CN201310035534A CN103060578A CN 103060578 A CN103060578 A CN 103060578A CN 2013100355343 A CN2013100355343 A CN 2013100355343A CN 201310035534 A CN201310035534 A CN 201310035534A CN 103060578 A CN103060578 A CN 103060578A
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Abstract
The invention discloses a method for smelting a lead-bismuth concentrate in an oxygen-rich side-blown duplex furnace, belonging to the technical field of smelting bismuth concentrates. The method comprises the steps of preparing raw materials, and smelting in the oxygen-rich side-blown oxidation-reduction duplex furnace to directly produce a crude bismuth alloy. According to the method, scrap iron is not required to be added, so that the production cost is low; the concentration of SO2 in flue gases generated from oxidizing smelting reaches 10 to 25 percent, and the SO2 can be recycled to prepare acid, so that the problem of environmental pollution caused by the flue gases is solved; and the oxidation-reduction duplex smelting ensures that the direct yield of bismuth is greatly promoted.
Description
Technical field
The present invention relates to a kind of plumbous bismuth concentrate oxygen-enriched side-blowing duplex furnace melting method, belong to the smelting technique field of plumbous bismuth concentrate.
Background technology
Plumbous bismuth concentrate is by galenobismuthite (PbSBi
2S
2) by the flotation gained, the main weight percent content composition of common plumbous bismuth concentrate is as follows: Bi5-50; Pb3-55 S10-25; Cu1-3; Fe2-25; Ag0.09-0.10; SiO
22.0-2.1; CaO 0.35-0.40; The concentrate raw meal particle size is less than 50mm, and moisture is lower than 10%.
Traditional plumbous bismuth concentrate pyrometallurgical smelting need to be made solvent with soda ash and quartzite, and adds enough iron filings and make reductive agent, output thick bismuth alloy, flue dust and smelting slag.The main drawback of the method has: 1. fusion process need add a large amount of iron filings and soda ash, causes production cost and energy consumption to increase, and the smelting slag bismuth-containing is high, causes the direct yield of bismuth low.2. the pyrometallurgical smelting fume amount is large, although plumbous bismuth concentrate sulfur-bearing up to 10-25%, the SO that pyrometallurgical smelting produces
2Concentration but is lower than 6%, can't directly send acid making system to reclaim.Directly discharging can not be satisfied environmental requirement again, increases the environmental protection cost.3. traditional metallurgical technology fails to realize the combination of oxidized still and reduction furnace, metallurgical technology length consuming time, and labour intensity is large.
Although there has been the production technique of oxygen-enriched side-blowing bath melting lead bullion in prior art, such as on November 14th, 2012, Chinese invention patent application publication No. CN 102776383A, a kind of oxygen-enriched side-blowing bath melting rough lead method is disclosed, with lead-containing material and quartzite, lime stone flux is pressed the silicate degree preparation of 0.9-1.3%, mixing, and lead-containing material and flux should be crushed to granularity≤40mm; 2. just lead smelting is prepared: first part lead bullion material melting is formed the 300-400mm degree of depth in side blowing smelting furnace; 8. lead bullion melting: the lead bullion material is sent into burner hearth continuously, coal-air ratio, temperature and the high-pressure oxygen-enriched supply of control melting, plumbous melt sinking is flow automatically through siphon port and be incubated deposit in the bed of stokehold, automatically flow into to water when the plumbous liquid degree of depth is laid in overflow port and become ingot in the injection molding, and the stove lean slag of floating accumulation is emitted, and introduces lead bullion material preparation section.This technique has also been mentioned the S0 in the fusion process simultaneously
2Flue gas is sent to the relieving haperacidity technology.But, this technique mainly be to leaded be main material institute specific design, and for containing the plumbous bismuth concentrate of Bi up to 5-50%, because the material ore deposit is different mutually, if directly use above-mentioned technique, will cause producing a large amount of bismuth smoke dusts, can not directly produce thick bismuth alloy, even cause the material freezing of a furnace.Must increase in addition the technique that from the bismuth smoke dust, reclaims bismuth, therefore need to be improved it.
Summary of the invention
The object of the invention is to overcome the deficiency of above-mentioned prior art and a kind of plumbous bismuth concentrate oxygen-enriched side-blowing duplex furnace melting method is provided, this technique need not add iron filings, the material non-clotted slag, production cost is low, technical process is short, and energy consumption is low, and the siege ability is high, environmental friendliness, the directly thick bismuth alloy of output.
Purpose of the present invention can be achieved by the following measures and finish, and a kind of plumbous bismuth concentrate oxygen-enriched side-blowing duplex furnace melting method comprises the steps:
1. prepare burden
Press plumbous bismuth concentrate: the quality of Wingdale: quartz sand=1:0.07:0.12, is sent into by rubber conveyer in the oxidizing semlting section of oxygen-enriched side-blowing duplex furnace after disk feeder feed batching than weighing;
2. thick bismuth alloy melting
Be that the air of 40-95% carries out oxygen-enriched air smelting to entering the furnace charge in the oxygen-enriched side-blowing duplex furnace oxidizing semlting section, passing into oxygen concentration, smelting temperature is controlled at 1150-1250 ℃; After the melting 1 hour, stop to pass into oxygen-rich air, insulation makes molten materials clarification 30min, the melting slag that produces directly enters the retailoring section by material trough, press simultaneously the mass ratio of bavin coal: melting slag=1:10-15, add in the reduction melting section and contain the bavin coal of C weight ﹥ 60%, and to pass into oxygen concentration be that the 40-60% air carries out retailoring, smelting temperature is 1200-1300 ℃, smelting time 1 hour; And then insulation clarification 30min; After to be restored the finishing, from the thick bismuth alloy of reduction furnace body of heater bottom removal, the upper strata smelting slag carries out selling outward after the shrend;
3. flue gas is processed
2. the high-temperature flue gas that step is produced produces vapor recovery heat energy by waste heat boiler; Cooled flue gas send the acid making system extracting sulfuric acid after electricity is received flue dust, collected flue dust returns batching section prepared furnace charge and repeats melting.
The structure of described oxygen-enriched side-blowing duplex furnace is that an oxygen-enriched side-blowing oxidized still is by reduction furnace of material trough series connection; Plumbous bismuth concentrate carries out retailoring through directly advancing reduction furnace after the melting of oxidized still oxygen-rich oxide first.
In order to realize further purpose of the present invention, the composition range of described plumbous bismuth concentrate is: Bi5-50; Pb3-55 S10-25; Cu1-3; Fe2-25; Ag0.08-0.10; SiO
22.0-2.1; CaO 0.35-0.40; The concentrate raw meal particle size is less than 50mm, and moisture is lower than 10%.
In order to realize further purpose of the present invention, described high-temperature flue gas contains SO
2Mass percent concentration is up to 10-25%.
In order to realize further purpose of the present invention, described Wingdale contains CaO ﹥ 50%, and quartz sand contains SiO
2﹥ 85%.
The present invention and traditional plumbous bismuth concentrate treatment process compare, and the present invention adopts the plumbous bismuth concentrate of oxygen-enriched side-blowing duplex furnace melting, and the thick bismuth alloy of output has following advantage:
1. adopt the duplex furnace melting technology, employing need not material pelletization brickmaking, directly directly send into the mixed stirring of bulk granular material in the stove, uninterrupted continuous dosing, continuous smelting, the directly thick bismuth alloy of output, greatly simplified the process of melting, the direct yield of bismuth is high, and fusion process need not add iron filings, and production cost is low;
2. melting speed is fast, the material non-clotted slag, the thick bismuth alloy method of this oxygen-enriched side-blowing duplex furnace melting, its Technology is simplified the method for formulating of material, directly adopts bulk cargo, cold burden directly into the form of stove, improves effect than in the past material compound method and reaches 25 times more than, by melting slag is directly entered the retailoring section by material trough, the change of melt transporting mode has realized seething stirring, realizes the material non-clotted slag.Simultaneously heat energy loss is few, and hot merit is efficient, continuously feeding, and continuous smelting, the speed of melting has greatly been accelerated in the discontinuous slagging, obviously improves the furnace bed index value of melting.Add the reduction furnace ratio with common blast furnace, improve speed of melting and reach 35-40%;
3. SO in flue gas during melting
2Concentration up to 10-25%, can directly send acid making system to reclaim sulphur, solve simultaneously SO
2The emission problem problem, played and reduce to have polluted, improved Working environment, reduced the discharging of " three wastes ", environmental friendliness;
4. adopt the duplex furnace melting technology, Production Flow Chart is shortened, and labour intensity is low, and the bismuth rate of recovery is high.
Description of drawings
Fig. 1 is process flow diagram of the present invention.
Embodiment
Describe the present invention below in conjunction with accompanying drawing in detail with specific embodiment, but be not to be interpreted as concrete restriction of the present invention.
The main component that present embodiment is processed plumbous bismuth concentrate is as follows: Bi36.83; Pb12.24 S19.77; Cu4.08; Fe2.67; Ag0.000921; SiO
22.09; CaO0.38;
Plumbous bismuth concentrate oxygen-enriched side-blowing duplex furnace melting method comprises the steps:
1. prepare burden
Press plumbous bismuth concentrate: the quality of Wingdale: quartz sand=1:0.07:0.12, is sent into by rubber conveyer in the oxidizing semlting section of oxygen-enriched side-blowing duplex furnace after disk feeder feed batching than weighing;
2. thick bismuth alloy melting
Be that 85% air carries out oxygen-enriched air smelting to entering the furnace charge in the oxygen-enriched side-blowing duplex furnace oxidizing semlting section, passing into oxygen concentration, smelting temperature is controlled at 1150-1250 ℃; After the melting 1 hour, stop to pass into oxygen-rich air, insulation makes molten materials clarification 30min, the melting slag that produces directly enters the retailoring section by material trough, press simultaneously the mass ratio of bavin coal: melting slag=1:10, add in the reduction melting section and contain the bavin coal of C weight ﹥ 60%, and to pass into oxygen concentration be that 50% air carries out retailoring, smelting temperature is 1200-1300 ℃, smelting time 1 hour; And then insulation clarification 30min; After to be restored the finishing, from the thick bismuth alloy of reduction furnace body of heater bottom removal, the upper strata smelting slag carries out selling outward after the shrend;
3. flue gas is processed
2. the high-temperature flue gas that step is produced produces vapor recovery heat energy by waste heat boiler; Cooled flue gas send the acid making system extracting sulfuric acid after electricity is received flue dust, collected flue dust returns batching section prepared furnace charge and repeats melting;
Above-mentioned Wingdale contains CaO ﹥ 45%, and quartz sand contains SiO
2﹥ 85%;
Above-mentioned high-temperature flue gas contains SO
2Mass percent concentration is up to 22%;
Through examinations, with the thick bismuth alloy bismuth-containing 96.23% of this technique gained, smelting slag bismuth-containing 1.94%; Metal recovery rate is respectively bismuth 97%, and plumbous 95%, silver-colored 98%.
Claims (5)
1. a plumbous bismuth concentrate oxygen-enriched side-blowing duplex furnace melting method comprises the steps:
1. prepare burden
Press plumbous bismuth concentrate: the quality of Wingdale: quartz sand=1:0.07:0.12, is sent into by rubber conveyer in the oxidizing semlting section of oxygen-enriched side-blowing duplex furnace after disk feeder feed batching than weighing;
2. thick bismuth alloy melting
Be that the air of 40-95% carries out oxygen-enriched air smelting to entering the furnace charge in the oxygen-enriched side-blowing duplex furnace oxidizing semlting section, passing into oxygen concentration, smelting temperature is controlled at 1150-1250 ℃; After the melting 1 hour, stop to pass into oxygen-rich air, insulation makes molten materials clarification 30min, the melting slag that produces directly enters the retailoring section by material trough, press simultaneously the mass ratio of bavin coal: melting slag=1:10-15, add in the reduction melting section and contain the bavin coal of C weight ﹥ 60%, and to pass into oxygen concentration be that the 40-60% air carries out retailoring, smelting temperature is 1200-1300 ℃, smelting time 1 hour; And then insulation clarification 30min; After to be restored the finishing, from the thick bismuth alloy of reduction furnace body of heater bottom removal, the upper strata smelting slag carries out selling outward after the shrend;
3. flue gas is processed
2. the high-temperature flue gas that step is produced produces vapor recovery heat energy by waste heat boiler; Cooled flue gas send the acid making system extracting sulfuric acid after electricity is received flue dust, collected flue dust returns batching section prepared furnace charge and repeats melting.
2. a kind of plumbous bismuth concentrate oxygen-enriched side-blowing duplex furnace melting method according to claim 1 is characterized in that: the structure of described oxygen-enriched side-blowing duplex furnace is that an oxygen-enriched side-blowing oxidized still is by reduction furnace of material trough series connection; Plumbous bismuth concentrate carries out retailoring through directly advancing reduction furnace after the melting of oxidized still oxygen-rich oxide first.
3. a kind of plumbous bismuth concentrate oxygen-enriched side-blowing duplex furnace melting method according to claim 1, it is characterized in that: the composition range of described plumbous bismuth concentrate is: Bi5-50; Pb3-55 S10-25; Cu1-3; Fe2-25; Ag0.08-0.10; SiO
22.0-2.1; CaO 0.35-0.40; The concentrate raw meal particle size is less than 50mm, and moisture is lower than 10%.
4. a kind of plumbous bismuth concentrate oxygen-enriched side-blowing duplex furnace melting method according to claim 1, it is characterized in that: described high-temperature flue gas contains SO
2Mass percent concentration is up to 10-25%.
5. a kind of plumbous bismuth concentrate oxygen-enriched side-blowing duplex furnace melting method according to claim 1, it is characterized in that: described Wingdale contains CaO ﹥ 50%, and quartz sand contains SiO
2﹥ 85%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310035534.3A CN103060578B (en) | 2013-01-30 | 2013-01-30 | Method for smelting lead-bismuth concentrate in oxygen-rich side-blown duplex furnace |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103667712A (en) * | 2013-12-12 | 2014-03-26 | 中南大学 | Method for smelting lead-containing waste and copper-containing waste synchronously in molten pool |
| CN104674022A (en) * | 2014-12-22 | 2015-06-03 | 芜湖金龙模具锻造有限责任公司 | Solvent for crude lead smelting |
| CN115786706A (en) * | 2022-11-28 | 2023-03-14 | 郴州金铖环保科技有限公司 | Method for reducing and smelting lead, bismuth and the like by using biomass gas |
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| CN102041394A (en) * | 2010-12-30 | 2011-05-04 | 郴州市金贵银业股份有限公司 | Process for producing refined bismuth by utilizing bismuth oxychloride |
| CN102321814A (en) * | 2011-09-05 | 2012-01-18 | 中南大学 | Molten pool melting method of bismuth sulphide concentrate |
| CN102676851A (en) * | 2012-05-25 | 2012-09-19 | 锡矿山闪星锑业有限责任公司 | Device for crude bismuth fire refining |
| CN102747232A (en) * | 2012-07-06 | 2012-10-24 | 赵志强 | Method for treating refined copper bismuth dross by electric induction furnace |
| CN102776383A (en) * | 2012-07-04 | 2012-11-14 | 杨龙安 | Method for smelting crude lead in oxygen-enriched side-blowing smelting furnace |
-
2013
- 2013-01-30 CN CN201310035534.3A patent/CN103060578B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102041394A (en) * | 2010-12-30 | 2011-05-04 | 郴州市金贵银业股份有限公司 | Process for producing refined bismuth by utilizing bismuth oxychloride |
| CN102321814A (en) * | 2011-09-05 | 2012-01-18 | 中南大学 | Molten pool melting method of bismuth sulphide concentrate |
| CN102676851A (en) * | 2012-05-25 | 2012-09-19 | 锡矿山闪星锑业有限责任公司 | Device for crude bismuth fire refining |
| CN102776383A (en) * | 2012-07-04 | 2012-11-14 | 杨龙安 | Method for smelting crude lead in oxygen-enriched side-blowing smelting furnace |
| CN102747232A (en) * | 2012-07-06 | 2012-10-24 | 赵志强 | Method for treating refined copper bismuth dross by electric induction furnace |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103667712A (en) * | 2013-12-12 | 2014-03-26 | 中南大学 | Method for smelting lead-containing waste and copper-containing waste synchronously in molten pool |
| CN103667712B (en) * | 2013-12-12 | 2015-08-12 | 中南大学 | A kind of method of the leaded and synchronous bath smelting of copper-bearing waste material |
| CN104674022A (en) * | 2014-12-22 | 2015-06-03 | 芜湖金龙模具锻造有限责任公司 | Solvent for crude lead smelting |
| CN104674022B (en) * | 2014-12-22 | 2018-12-04 | 芜湖金龙模具锻造有限责任公司 | A kind of lead smelt solvent |
| CN115786706A (en) * | 2022-11-28 | 2023-03-14 | 郴州金铖环保科技有限公司 | Method for reducing and smelting lead, bismuth and the like by using biomass gas |
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Inventor after: Xiao Hui Inventor after: Wang Zhixiong Inventor after: Cao Yongran Inventor after: Lu Weihong Inventor after: Wu Zuxiang Inventor after: Zhou Jianhua Inventor before: Cao Yongran Inventor before: Wang Zhixiong Inventor before: Xiao Hui Inventor before: Lu Weihong |
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